1. Center for Outcomes Research and Evaluation, Maine Medical Center, Portland, Maine (PKJH)
2. Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland (WMPK, ANF)
3. Center for Social Marketing and Behavior Change, Academy for Educational Development, Washington, DC (TL)
4. User-Centered Design, Ashburn, Virginia (BK)
5. Office of Market Research and Evaluation, National Cancer Institute, Bethesda, Maryland (HM)